Abov A96A148, Руководство пользователя

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A96G140/A96G148/A96A148 User’s manual 6. I/O ports
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P4 (P4 Data Register): A0H
7 6 5 4 3 2 1 0
P47 P46 P45 P44 P43 P42 P41 P40
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value: 00H
P4[7:0] I/O Data
P4IO (P4 Direction Register): C9H
7 6 5 4 3 2 1 0
P47IO P46IO P45IO P44IO P43IO P42IO P41IO P40IO
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value: 00H
P4IO[7:0] P4 Data I/O Direction
0 Input
1 Output
P4PU (P4 Pull-up Resistor Selection Register): A3H
7 6 5 4 3 2 1 0
P47PU P46PU P45PU P44PU P43PU P42PU P41PU P40PU
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value: 00H
P4PU[3:0] Configure Pull-up Resistor of P4 Port
0 Disable
1 Enable
P4OD (P4 Open-drain Selection Register): 94H
7 6 5 4 3 2 1 0
P47OD P46OD P45OD P44OD P43OD P42OD P41OD P40OD
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value: 00H
P4OD[3:0] Configure Open-drain of P4 Port
0 Push-pull output
1 Open-drain output